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Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | $ 8,504 |  | $ 7,905 |  | $ 24,636 |  | $ 22,261 |
Income Before Taxes |  | 787 |  | 677 |  | 1,976 |  | 1,027 |
Pretax operating income |  | 1,152 |  | 1,059 |  | 3,220 |  | 2,766 |
Interest expense |  | 147 |  | 142 |  | 434 |  | 422 |
Reservoir Characterization |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 1,673 |  |  |  | 4,865 |  |  |
Drilling |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 2,429 |  |  |  | 6,789 |  |  |
Production |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 3,252 |  |  |  | 9,468 |  |  |
Cameron |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 1,298 |  |  |  | 3,902 |  |  |
Operating Segments |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 8,504 |  | 7,905 |  | 24,636 |  | 22,261 |
Interest income |  | 2 |  | 4 |  | 7 |  | 15 |
Interest expense |  | 8 |  | 13 |  | 29 |  | 39 |
Operating Segments | Reservoir Characterization |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 1,673 |  | 1,771 |  | 4,865 |  | 5,148 |
Income Before Taxes |  | 373 |  | 311 |  | 1,030 |  | 891 |
Operating Segments | Drilling |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 2,429 |  | 2,120 |  | 6,789 |  | 6,212 |
Income Before Taxes |  | 339 |  | 301 |  | 921 |  | 832 |
Operating Segments | Production |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 3,252 |  | 2,876 |  | 9,468 |  | 7,559 |
Income Before Taxes |  | 320 |  | 283 |  | 851 |  | 614 |
Operating Segments | Cameron |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | 1,298 |  | 1,297 |  | 3,902 |  | 3,791 |
Income Before Taxes |  | 148 |  | 194 |  | 481 |  | 530 |
Eliminations & other |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Revenue |  | (148) |  | (159) |  | (388) |  | (449) |
Income Before Taxes |  | (28) |  | (30) |  | (63) |  | (101) |
Corporate & other | [1] | (234) |  | (234) |  | (699) |  | (715) |
Interest income |  | 8 | [2] | 30 | [2] | 44 | [3] | 82 | [3]
Interest expense |  | $ (139) | [4] | (129) | [4] | (405) | [5] | (383) | [5]
Charges and credits | [6] |  |  | $ (49) |  | $ (184) |  | $ (723) |
[1] | Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.
[2] | Interest income excludes amounts which are included in the segments’ income ($2 million in 2018; $4 million in 2017).
[3] | Interest income excludes amounts which are included in the segments’ income ($7 million in 2018; $15 million in 2017).
[4] | Interest expense excludes amounts which are included in the segments’ income ($8 million in 2018; $13 million in 2017).
[5] | Interest expense excludes amounts which are included in the segments’ income ($29 million in 2018; $39 million in 2017).
[6] | See Note 2 – Charges and Credits.

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